1. Department of Gynecology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
2. Department of Obstetrics and Gynecology, Dongguan People's Hospital (Affiliated Dongguan Hospital, Southern Medical University), Dongguan, China.
3. Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
4. Center for Reproductive Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
5. Department of Gynecology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
6. Department of Urology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.